Rotary drier.



w. o. AIIZINGER."

ROTARY DRIER.

APPLICATION FILED Nov. I. 1917.

Patented Sept. 10, 1918.

:runnin-in wnmmm or'roanznvenn, or NASHVILLE, TENNESSEE.

To ail 'whom t may concern.'

Be it known that l, WILLIAM 0. Ammonia, a citizen of the United States,and a resident o Nashville, in the county of Davidson and State ofTennessee, have invented a new and useful improvement in Rotary Driers,of`

which the following is a specication.- n

My invention relates to proveniente in rotary driers, more especiallythose iers which are of the electric type, and it consists in thecombinations, constructions and arrangements herein described andclaimed, An object of my invention is'to rovide a rotary drier which isintended primarily ior use with gra hite rening machinery, f

one which willqta e the graphite which has been separated by a dotationprocess, and quickly and thoroughly dry, the graphite.

A further object of `my invention is to;

provide a device which will not only dry the graphite, but which-willcause it to .split apart or disintegrate, so that any foreign mattercontained in the body oi the graphite will either beconsumed or will bebrought into such condition that it may be easily extractedsnbsequently,4

A .further obiiect ci my invention is to provide a rotary drier in whichthe regress of the material from one end to t e other of the drier, isassisted by means of the particular form and position of the heatingelements;

: A further object of iny inventiongis to 'orovide a drier havingheating units which rnay be easily placed in position or removed.,

i further object invention is to provide a drier having electric heatingunits "chicA will ,D he graphite to a high tern peratnre in c niclrtime, thus causing it to disintegrate and be thoroughly dried.

@ther objects and advantages will apnear in the ollowing specidcation,and the novel features of the device-will be partienlarly pointed ont inthe appended claims.

My invention is illustrated in the accorcpanying drawings :forming apart of this application, in which: v

Figure l is a central sectional view through the drier. y

iiig. 2 is asection along the line 9,-2 of Fig, l.

31 is a section along the line 8,-3 i :t1

ligg;9 d isdetail view of a portion of the drier and one oi the heatingelements.

5- is a sectional view ci a portion ci.

v omen.

Specification of Letters Patent. Patented Sept. 3 0, 1918, Applicationled Novemberi, 1917. I Serial No. 199,715.

-2 of a heatresisting material such as asbestos, and an inner member 3disposed contignons to said heat resisting lining.

The cylinder thus formed is provided with heads d and 5, respectively,the head d being dat on its inner side and being braced BX- ternally bymeans oit' braces 6. |The head 5 is slightly dished at its inner side asshown at Both of these heads have flanges 8 which extend over the end ofthe cylinder.

which is jonrnaled in a bearing 10 carried The head t is provided withathreaded hub 'da arranged to engage a threaded sleeve El` by an uprightil. Extending through the sleeve 9 is a `feed pipe l2., i

At the opposite, end ci the cylinder, the head 5 is'tlireaded to asleeve 13 journaled in bearings camied by a frame '15. The latter termsa housing for a worin' wheel i6 which is driven by a worm 17 on theshaft of a motor lill. v v

.dt one end off the cylinder is 4a-series ot inwardly extending unitslilre that shown in Fig, d, a description of one et these units willsnice, ince they are all alike. Each unit consists ci a coil made bybending a strip ci metal bach and forth. illhis strip ot nietal is shownat i8, @ne end ci the stri@ .is'connected with the binding vpost i9snitablf insulated from .the casing, and the' other end is held hy abolt 20 which is also inselated.c The various nnits are connected no inseries, as shown in Fig. S, clear around the cylinder and at the end cithe units on one side ci the enit shown in d and ad-I jacent thereto,there is another binding post not sliown, similar to the binding posti9, these two binding posts being;` the means by which the current issupplied the series ci nesting elenfientsa The bolt 20 need not be abinding post, bnt if it should loe desirable to up the heating unitsinto one or esll lilo

ric i series or in parallel, as desired. The units are separated by apartition 24: which is se- =cured to the cylinder by means of lugs 21,

spaces 23 being' provided at the outer edges 'f of the partitionV forthe passage of the heated mixture. A similar partition 24 divides thespect to the axis of the cylinder, this angle coincidingFwith the angleofthe same, as shown in ig. 1.

From the foregoing description of the various parts of the device, theoperation thereof may be readily understood. -The 'i drieris rotated bymeans of the motor M, as

shown).

stated. Current is supplied to the heating units 18 from any suitablesource (not These units are highly heated. The graphite is forcedthrough the inlet ipe 12 in a plastic state, that is to say, the sakesof graphite which have been freed from their associated gangue by a'flotation process which forms the subject of ak copending application,have had the water removed partly but not entirely. The flakes,therefore, are wet and cohere into a plastic mass which continuallydrops into the rotary drier. This plastic mass coming in contact withthe highly heated resistance elements 18, is not only dried, but thegraphite is disintegrated to a certain extent, and .certain foreignmatter contained in the graphite is consumed by the high heat. Othervforeign matter either burns to an ashor .drops out of the graphite, dueto the a tation and to the disintegration of the fla es. The inaterialis propelled forward, as stated, by the angularly disposed units andvanes 25. In this it is assisted by a suction fan (not shown) which isconnected to the sleeve 13 at the exit end of the rotary drier. The fan,however, forms no part of the resent invention, having been fullyv setorth in a copending application.

I desire to call particular attention to the l fact that there is asudden heating of the graphite. This causes the moist graphite todisintegrate, where a lslow heat would not. It also'thoroughly dries thegraphite so that the latter easily passes around the partitions 21and'24. All the graphite which has not been thoroughly dried` ordisintegrated by the first group of heating units is practically so bythe second group, and then the graphite passes the partitions and istaken up by the vanes 25v and forced toward the end of the cylinderwhere it is drawn out by the suction created by the fan (not shown),

aereas@ Due to the fact o f the provision of the heat resisting lining,only a very small portion of the heat escapes, the greater part of theheat being used in breaking up and drying thegraphite.

I claim:

1. A rotary drier comprising a cylindrical casing, means for insulatingthe walls of the casing to prevent the escape of heat, means fordeliverin material to be heated at one end of the casing, a series ofelectrical heating units at the inlet end of the casing, a series ofvanes at the outlet end, said vanes being inclined angularly withrespect to the longitudinal axis of the cylinder for propelling thematerial to be heated, forwardly.

2. A rotary drier comprising a cylindrical casing, means for insulatingthe walls of the casing to prevent the escape of heat, means fordelivering material to be heated at one end of the casing, a series ofelectrical heating units at the inlet end of the casing, said series ofelectrical heating units projecting inwardly from the walls of thecylinder and being arranged to propel the material to be heated,forwardly.

3. A rotary drier comprising a cylindrical f casing having heatinsulating walls, means for rotating the casing, means for deliveringmaterial to be heated at one end of the casing, a series'of electricalheating units at the inlet end of the casing, said series of units-comprising coils projecting inwardly from the walls of the cylindersand being insulated therefrom, certain of said coils being connected uin series, and a series of inwardly exten ing vanes at the opposite endof the cylinder, said coils and said vanes being disposed at an angle tothe longitudinal axis of the cylinder, whereby the material is propelledfrom one end of the cylinder to the other during the rotation thereof.

tudinal axis of the cylinders for propelling the material forwardly, anda partition disposed between said vanes and one of'said heating units,said partition having openings. at its edges for the passage of thematerial.

5. A rotary drier comprising a casing having heat insulated walls, aninlet at one end of the casing, an outlet at the other end of thecasing, means for rotating the casing, a plurality of groups ofelectrical heating units at the inlet end ofthe casing, said groupsbeing separated by a partition having openings at its outer edges, aplu- 5 rality of inwardly extending vanes at the opposite end of thecylinder, said vanes being arranged angularly with respect to thelongitudinal axis of the cylinders for propelling the materialforwardly, a partition .0 disposed bet-Ween said vanes and one of saidheating units, said partition having openings at its edges for thepassage of the material, each of the series of heating units beingcomposed of an individual coil extending into the cylinder from theWalls thereof and being insulated from the Walls, each of said unitsbein inclined with respect to the llongitudinal axis of the cylinder.

WILLIAM OTTO ARZINGER.

